Ability to add Prometheus port firewall rule

run-e2e-with-prometheus-fw-rule.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# Copyright 2019 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+# Add firewall rule for Prometheus port (9090)
+if [[ -n "${KUBE_GKE_NETWORK:-}" ]]; then
+  PROMETHEUS_RULE_NAME="${KUBE_GKE_NETWORK}-9090"
+  if ! gcloud compute firewall-rules describe "${PROMETHEUS_RULE_NAME}" > /dev/null; then
+    echo "Prometheus firewall rule not found, creating..."
+    echo COMMAND: gcloud compute firewall-rules create --network "${KUBE_GKE_NETWORK}" --source-ranges 0.0.0.0/0 --allow tcp:9090 "${PROMETHEUS_RULE_NAME}"
+    gcloud compute firewall-rules create --network "${KUBE_GKE_NETWORK}" --source-ranges 0.0.0.0/0 --allow tcp:9090 "${PROMETHEUS_RULE_NAME}"
+  fi
+fi
+
+SCRIPT_DIR=$(dirname "$0")
+echo COMMAND: $SCRIPT_DIR/run-e2e.sh ${@}
+$SCRIPT_DIR/run-e2e.sh ${@}